Physical and particle flow modeling of jointed rock block behavior under uniaxial loading

Pinnaduwa Kulatilake, Bwalya Malama, Jialai Wang

Research output: Contribution to journalArticle

158 Citations (Scopus)

Abstract

Laboratory experiments and numerical simulations, using Particle Flow Code (PFC3D), were performed to study the behavior of jointed blocks of model material under uniaxial loading. The effect of joint geometry parameters on the uniaxial compressive strength of jointed blocks was investigated and this paper presents the results of the experiments and numerical simulations. The fracture tensor component in a given direction is used to quantify the combined directional effect of joint geometry parameters including joint density, orientation and size distributions, and the number of joint sets. The variation of the uniaxial compressive strength of the jointed blocks of the model material with the fracture tensor component was investigated. Both the laboratory experiments and the numerical simulations showed that the uniaxial block strength decreases in a nonlinear manner with increasing values of the fracture tensor component. It was observed that joint geometry configuration controls the mode of failure of the jointed blocks and three modes of failure were identified, namely (a) tensile splitting through the intact material, (b) failure by sliding along the joint plane and/or by displacement normal to the joint plane and, (c) mixed mode failure involving both the failure mechanisms in (a) and (b). It has also been shown that with careful parameter calibration procedures, PFC3D could be used to model the strength behavior of jointed blocks of rock.

Original languageEnglish (US)
Pages (from-to)641-657
Number of pages17
JournalInternational Journal of Rock Mechanics and Mining Sciences
Volume38
Issue number5
DOIs
StatePublished - Jul 2001

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rock block
flow modeling
Tensors
Rocks
compressive strength
geometry
Compressive strength
Geometry
Computer simulation
simulation
Experiments
failure mechanism
Failure modes
sliding
Calibration
calibration
rock
parameter
material
particle

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

Cite this

Physical and particle flow modeling of jointed rock block behavior under uniaxial loading. / Kulatilake, Pinnaduwa; Malama, Bwalya; Wang, Jialai.

In: International Journal of Rock Mechanics and Mining Sciences, Vol. 38, No. 5, 07.2001, p. 641-657.

Research output: Contribution to journalArticle

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